/*
 * Copyright (C) 2007-2012 by XDEV Software, All Rights Reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License version 3.0 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 
package xdev.ui;


import javax.swing.text.AttributeSet;
import javax.swing.text.BadLocationException;
import javax.swing.text.PlainDocument;

import xdev.util.logging.LoggerFactory;
import xdev.util.logging.XdevLogger;


public class MaxSignDocument extends PlainDocument
{
	
	/**
	 * Logger instance for this class.
	 */
	private static final XdevLogger	log					= LoggerFactory
																.getLogger(MaxSignDocument.class);
	
	public final static String	MAX_SIGNS_PROPERTY	= "maxSignCount";

	private int					maxSignCount;


	public MaxSignDocument(int maxSignCount)
	{
		if(maxSignCount <= 0)
		{
			throw new IllegalArgumentException("maxSignCount<=0");
		}

		this.maxSignCount = maxSignCount;
	}


	public int getMaxSignCount()
	{
		return maxSignCount;
	}


	public void setMaxSignCount(int maxSignsCount)
	{
		this.maxSignCount = maxSignsCount;
		int len = getLength();
		if(len > maxSignsCount)
		{
			try
			{
				remove(maxSignsCount,len - maxSignsCount);
			}
			catch(Exception e)
			{
				log.error(e);
			}
		}
	}


	@Override
	public void insertString(int offs, String str, AttributeSet a) throws BadLocationException
	{
		int max = maxSignCount - getLength();
		super.insertString(offs,str.substring(0,Math.min(max,str.length())),a);
	}
}
